- Oct 10, 1999
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Been playing with this 2.8 Ghz CPU for about a week.
It's an SL6Z5 stepping.
It'll run at 3.7Ghz, but I've elected to run it at 3.5 at a 1:1 memory timing using Geil PC4000 ram. Mainly because of voltage requirements and heat.
At 3.5 the CPU only needs 1.65v to run stable, but needs 1.9v at 3.7.
A couple things I've noticed using a IC7-Max3 motherboard. Using all 4 banks of memory will disable PAT. I've redone this several times and it holds true.
Going back to two sticks of RAM and PAT is enabled again. The CPU on this board would not run at 3.7 GHz with all banks populated.
AT 3.5 1:1 the system is amazingly fast.
I'm using a water system to cool with.
I had tried using two Prescott cpu's and at 3.5 the Northwood core is still faster.
The biggest thing though is the heat involved.
Temps:
Northwood 3.5 Ghz ____________Prescott 3.5
CPU
Idle 38C_ Load 49C____________Idle 44C Load 59C
CAPS s reported by the Max3
Idle 34C_Load 43.5 C___________Idle 40C__Load 55C!
Definately something to be aware of when using Prescott CPU's for overclocking.
The OTES plastic shroud on the motherboard became to hot to touch at one point in time while overclocking the Prescott.
It's an SL6Z5 stepping.
It'll run at 3.7Ghz, but I've elected to run it at 3.5 at a 1:1 memory timing using Geil PC4000 ram. Mainly because of voltage requirements and heat.
At 3.5 the CPU only needs 1.65v to run stable, but needs 1.9v at 3.7.
A couple things I've noticed using a IC7-Max3 motherboard. Using all 4 banks of memory will disable PAT. I've redone this several times and it holds true.
Going back to two sticks of RAM and PAT is enabled again. The CPU on this board would not run at 3.7 GHz with all banks populated.
AT 3.5 1:1 the system is amazingly fast.
I'm using a water system to cool with.
I had tried using two Prescott cpu's and at 3.5 the Northwood core is still faster.
The biggest thing though is the heat involved.
Temps:
Northwood 3.5 Ghz ____________Prescott 3.5
CPU
Idle 38C_ Load 49C____________Idle 44C Load 59C
CAPS s reported by the Max3
Idle 34C_Load 43.5 C___________Idle 40C__Load 55C!
Definately something to be aware of when using Prescott CPU's for overclocking.
The OTES plastic shroud on the motherboard became to hot to touch at one point in time while overclocking the Prescott.